Compilare: user.cpp: In function ‘int main()’: user.cpp:80:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ismquery.in", "r", stdin); ^ user.cpp:81:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ismquery.out", "w", stdout); ^ user.cpp:85:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, MAXBUF, stdin); ^ user.cpp: In function ‘int getInt()’: user.cpp:62:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, MAXBUF, stdin); ^ user.cpp:68:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++bcnt == MAXBUF) { fread(s, 1, MAXBUF, stdin); bcnt = 0; } ^ user.cpp:73:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++bcnt == MAXBUF) { fread(s, 1, MAXBUF, stdin); bcnt = 0; } ^